<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Notes about Cirrus SVGA usage</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Bochs User Manual"
HREF="index.html"><LINK
REL="UP"
TITLE="Tips and Techniques"
HREF="howto.html"><LINK
REL="PREVIOUS"
TITLE="Notes about VESA usage"
HREF="vesa-notes.html"><LINK
REL="NEXT"
TITLE="Disk Image Modes"
HREF="harddisk-modes.html"></HEAD
><BODY
CLASS="SECTION"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Bochs User Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="vesa-notes.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 8. Tips and Techniques</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="harddisk-modes.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECTION"
><H1
CLASS="SECTION"
><A
NAME="CIRRUS-NOTES"
>8.17. Notes about Cirrus SVGA usage</A
></H1
><P
>    Since Bochs 2.2 it is possible to use Cirrus SVGA graphics. The Cirrus device
    supports both ISA and PCI depending on the <TT
CLASS="FILENAME"
>bochsrc</TT
> settings.
    If PCI is disabled or the Cirrus card is not assigned to a PCI slot, it appears
    as a CL-GD5430 ISA with 2MB VRAM. If you assign the Cirrus card to a PCI slot,
    it appears as a CL-GD5446 PCI with 4MB VRAM.
  </P
><P
>    In order to use Cirrus SVGA, you need to compile Bochs using the <CODE
CLASS="OPTION"
>--enable-clgd54xx</CODE
>
    option and enable it in your <TT
CLASS="FILENAME"
>bochsrc</TT
> by setting the
    <A
HREF="bochsrc.html#BOCHSOPT-VGA"
>vga option</A
> to <CODE
CLASS="PARAMETER"
>cirrus</CODE
>.
    Finally, you need to use the Cirrus version of the
    <A
HREF="http://savannah.nongnu.org/projects/vgabios/"
TARGET="_top"
>LGPL'd VGABIOS</A
>
    as <A
HREF="bochsrc.html#BOCHSOPT-VGAROMIMAGE"
>vgaromimage option</A
> for
    applications to correctly detect Cirrus support.
  </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SCREEN"
>  # Enable CL-GD5446 PCI
  vga: extension=cirrus
  vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest-cirrus
  i440fxsupport: enabled=1, slot1=cirrus
  </PRE
></TD
></TR
></TABLE
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>    The VGABIOS is already included in the Bochs release, so no separate download is necessary.
  </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="vesa-notes.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="harddisk-modes.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Notes about VESA usage</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="howto.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Disk Image Modes</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>